Process of producing threads from viscose



applying that principle, so as to UNITED STATES CHARLES A. HU'rrINeEn, or LAKEWOOD, Am) EDWA D RI'ITENHOUSE, or uam.-

LAND, onro, ASSIGNORS TO THE ACME woormzr-corron MILLS COMPANY, or

PATENTQ OFFICE.

CLEVELAND, OHIO, A CORPORATION OF OHIO.

PROCESS OF PRODUCING THREADS FROM VISCOSE.

No Drawing.

T 0 all whom it may concern:

Be it known that we, CHARLES A. HUTTIN- GER and EDWARD RrrrENHoUsE, citizens of the United States, residents, respectivel of Lakewood, county of Cuyahoga, and tate of Ohio, and Cleveland, county of Cuyahoga, and State of Ohio, have invented new and useful Improvements in Processesof Producing Threads from Viscose, of. which the following is a specification, the principle of the invention being herein explained and the best mode in which we have contemplated distinguish it from other inventions.

Our invention relates to processes of producin lustrous threads, etc., from viscose. This invention contemplates the production of a very soft and open thread. The invention relates particularly to the composition ofthe bath in which the viscose is re-generated into cellulose hydrate.

The following description sets forth in detail certain steps illustrating the method of carrying out our invention such disclosed steps constituting, however, but one of the various ways in which the principle of the invention may be utilized. In carrying out our improved process, we utilize a precipitating bath in the presence of a certain proportion of molasses or incorporate the molasses with the bath. The proportion" by weight of molasses may be from two to fifty per cent, but we have found that from ten to thirty per cent. gives very satisfactory results and that substantially twenty per cent. by weight gives the best results.

Our precipitating bath, in addition to the molasses, consists of an aqueous solution of a salt and preferably. of an aqueous solution of sodium bisu-lfate because the latter is a by-product which can bebought comparatively cheaply. The relative proportions which we use are substantially ten (1.0) parts by wei ht water, six (6) parts bisulfate,'and four 4) parts molasses. Because of its impurities, and hence its'-cheapness, we preferably use molasses known as thlrd run. However, if a purer and more costly molasses were used, we do not contemplate the use of a materially different proportion thereof Specification of Letters Patent. P t t 1 2 Application filed December 3, 1919.. SeriaTNo. 342,282. i

than that above set forth. The exact proportions of a very satisfactory bath will consist in one kilogram water, 681 grams sodium bisulfate and 410 rams molasses.

The thread obtained by spinning the multiple filaments of cellulose hydrate precipitated by a bath of this character disclosed is a product which has the necessary qualities as regards luster, strength and elasticity, and is also unusually soft and open. Our theory is that the extraordinary softness and openness is occasioned by the following physical action of the molasses while the filaments are setting in the precipitating bath. The molasses exteriorly coats the several strands of the viscose while the same is setting, possibly somewhat analogous to the coating of flour on a rolling board whereby the dough is prevented from sticking, so that the multiplicity of strands,from ten tosixty or more, according to the thread produced,do not stick or closely adhere when being twisted. This coating of molasses is Washed off in the usual water washing after the skein is formedand-the resultant product is the very soft and open thread which has been mentioned.

What we claim is:

1. In the process of. producing threads sulfate, water and molasses; and then spinning the resultant filaments, whereby a soft and open thread is obtained.

2. in the process of producing threads from viscose, the steps which consist, in introducing the latter in multiple streams into an aqueous solution of sodium bi-sulfate in the resence of molasses in proportion by weig it of the bath of from ten (10) to thirty (30) percent; and then spinning the resultant filaments, whereby a soft and open thread is obtained.

3. In the process of producing threads from viscose, the steps which consist, in introducing the latter in multiple streams into a precipitatin bath composed of substantially ten (10 parts by weight water; six (6) parts sodium bi-sulfate and four (4) parts molasses; and .then spinning the rep and ten (410) parts molasses; and then spinsultant filaments, whereby a soft and open thread is obtained. 4. In the process of producing threads 5 from viscose, the steps which consist, in in-.

troducing the latter in multiple streams into a precipltating' bath com osed of substantially one thousand (1,000 'parts by Weight water; six hundred and thirty-one (631) parts sodium bi-sulfate, and four hundred 10" ning the resultant filaments, whereby a soft and open thread is obtained.

Signed by us this 4th day of November, 1919.

CHARLES A. HUTTINGER. EDWARD RITTENHOUSE. 

